DOKK / manpages / debian 11 / undertime / moonphases.1.en
UNDERTIME(1) General Commands Manual UNDERTIME(1)

moonphases - display moon phases for a given period

moonphases [ start [ end ] ]

moonphases is a small program that displays the various moon phases (new, first, full, third, specifically) for the given period, delimited by start and end.

Dates are parsed by pyEphem as ISO-8601-like timestamps (YYYY-MM-DD HH:MM:SS), in the UTC timezone. Dates are shown in the local timezone, use the TZ environment variable to change.

start date, default now.
end date, default next 30 days.

Displays the next 30 days.

  $ moonphases
  2018-12-07 02:20:21 new
  2018-12-15 06:49:15 first
  2018-12-22 12:48:35 full
  2018-12-29 04:34:18 third
moonphases 2018-12-01
Moon phases for december 2018, same as above.

moonphases 2019 2020
Moon phases for all of 2019.

Default timezone.

tzselect(8) tzfile(5) undertime(1)

2018